2013 has seen the Google homepage feature many interesting doodles and the search engine made sure that the final day of the year keeps in tune with the others.

Keeping up with its tradition of apt doodles to mark important days, Google, on Tuesday, displayed an animated New Year's Eve 2013 doodle on its homepage to bid adieu to the year. It is the last Google doodle for the year

Google trends have revealed that Paleo was the most searched diet of the year. The name was released in the long awaited Google trends annual Zeitgeist list on Dec. 30, 2013. Zeitgeist is released every year so that people can know the most searchers keywords for the year.

As per the Google Transparency Report, India ranks second only after the US in requesting user data. While US had 10,918 requests of which 83 per cent were obtained, the Indian government had a total of 2,691 requests of which 64 per cent were procured.

Next in line are Germany, France and UK with 2311, 2011 and 1,274 requests respectively.

Google will invest $80m in solar-powered plants as it keeps in mind exactly what may end up powering its data centers in future.

Google announced in a blog post this week, a new $80 million investment in solar energy in California and Arizona, bringing its total investments in renewable energy since 2010 to over $1 billion. It is the latest step of an ongoing project by Google to lead the green energy industry.